Mining-machine



M. P. HOLMES.

MINING MACHINE. APPLICATION FILED FEB.28,1919

Patented May 17, 1921.

IIIIIIUHHJ/ UNITED STATES l iBA1-Em oFFicE.

` kMORRIS 1'. HOLMES, 0E cLAEEMoNT, NEW HAMPSHIRE, AssicfNoE rro SULLIVAN MACHINERY COMPANY A CORPORATION OF MASSACHUSETTS. i

To all whom if may concern: y y `Be it kknown that I, Monnis I). HOLMES,

T i a citizen of the United States, residing at particularly an improved truck of the type having a tilting member whereon the mining machine may be `loaded'or unloaded fromthe truck. More specifically, vention has yfor its object to provide an improved truck of the type set forth, having its tilting member pivotally. connected to the truck in an improved, simple, and rugged manner.

if In the accompanying drawings I have shown for purposes` of illustrationione emv bodiment which my invention may assume in practice. 1

In these drawings, i y Figure 1 is a side elevation of my improved truck with a mining machine mounted kin transport position thereon.

Fig. 2 is a side elevation of the the mining machine shown in process of being loaded thereon. l

Fig. 3 is a detail view showing my improved pivot for the tilting member. l

In this illustrative construction, I lhave shown a self-propelled truck frame V1 of usual construction adapted to carry amining machine and having rigid and continuous anged kside members and front Yand rear wheels, the truck frame herein being provided with a longitudinally-flanged tilting member 2 upon which the mining machine travels in its'movement onto or from Inasmuch as these various elef ments are broadly7 old, and my present inyvention is directed tothe pivot and support ing means for this tilting member, a further the truck.

description of ithe other mechanism seems to be unnecessary. p

In my kimproved construction it will be observedl that the tilting'member 2 'is pivotallyV supported in an improved manner at the front end of the truck frame 1. More particularly, it will be observed that an im- Specicaton of Letters Patent.

truck with MINING-MACHINE.

Patented May 17, 1921.

Application filed February 28, 1919. Serial No. 279,866.

proved, simplified, andl rugged pivot is proyided'therefor. This means, as rshown herein, is 1n the form of an upstanding transverse plate 3 fixed to and extending across the front end of the truck frame 1 and forming what may be called a knife edge pivot., As shown, this plate coperates with` a rear bottom plate 4l:A on the tilting member 2y to support the latter in its hori.

zontal position upon the truck, and yet spaced from the upperr horizontal surface `thereof, the bottom plate then resting upon the bottom of the frame 1 and supporting the rear end of themember 2 while the front end of the latter is supported on the plate 3.

It will also be noted that as the tiltingmember'2 is tilted from the position shown in Fig. 1 to the position shown in Fig. 2 during the discharge of the machine, and as the same is tilted from the position shown in Fig. 2 to the position shown in Fig. 1

during the `loading of the machine, this member moves labout ythe upper edgeof the plate 3I as on a knife edge pivot, the member 2,'as it approaches itsextreme positions also `having a limited sliding movement relative to the edge of the plate'S. It will also be observed that attached to the member 2 and disposed beneath the same I have provided a keeper adaptedto hold the member2 in the desired operative relation to the plate 3 and cooperate with `the latter kduring the sliding movement mentioned.

This keeper herein assumesthe shape of a lip or U-shaped member shaving one arm fixed to the bottom of the member 3 and another shorter arm extending upwardrelative to atransversely disposed and dependingA portion v6 herein suitably formed by the lower end of the plate 3, although the depending portionV 6,",asvillustrated, may also include ya cooperating transverse member 7 ofy angle construction fixed, thereto and to thebottom of the yframe land co- Qoperating with the plate 3 to/provide Van exceedingly rigid and yrugged structure.

As a result of my improved construction,

it will be noted that an exceedingly simple and rugged truck f is provided which is adapted to be very. cheaplymanufactured. More particularly, it will be observed that the pivotal connection of the member 2 is exceptionally rugged and adapted toy rough usage wear being minimized at the same downward movement thereof.

time that a construction is provided which is adapted to be very cheaply manufactured, all machining being unnecessary. It will also beobserved that due to the slight slid@ ing action of the tilting member 2 relative to the member 3, not only is the wear dis-l tributed over a relatively large surface, but

a slight retarding action is obtained tending to prevent the tilting member from suddenly occupying either of its extreme positions when the weight of the machine is upon an extremity of the same. Further, it will be noted that by supporting the tilting member when in its horizontal `position on two longitudinally spaced supports, comprising herein its pivot and the rearwardly located plate 4t, space is provided between the bottom of the tilting member and the upper surface of the horizontal portion of the truck frame l in such a manner as to permit the usual truck driving gear on the mining machine always to register in the desired relation with the 4cooperating gear on the truck despite accumulations of coaldust or the like which ordinarily accumulate adjacent the pivot of the tilting member and would otherwise limit the These and other advantages of my improved construction will, however, be clearly apparent to those skilled in the art.

While I have in this applicationspecifically described one form which my invention may assume in practice, it is to be understood that the invention may be modified and embodied in various forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is: j

1. In combination, a truck frame, a transverse plate thereon7 and a tilting member turning directly on said plate during its tilting operation. n Y

2. In" combination, a truck frame, means forming a transverse knife edge at the front thereof, and a tilting member turning on said knife edge during its tilting operation.

3. In combination, a truck frame, means forming a transverse bearing4 at the front end thereof, and a tilting machine supporting member slidable relative thereto during its tilting operation. Y

fi. In combination, a truck frame, a transverse member thereon, a machine receiving member tiltable and slidable on said member, and means for operatively connecting said elements. Y

5. In combination, a truck frame, means forming a transverse knife edge bearing at the front end thereof, a tilting machine supporting member tiltable thereon during its tilting operation, and means for maintaining said elements in operative relation. 6. In combination, a truck frame, means forming a transverse knife edge bea-ring at the frontend thereof, a tilting machine supporting member tiltable thereon during its tilting operation, and means carried on the under side of said tilting member for maintaining said elements in operative relation.

7. In combination, a truck frame, an upstanding member extending transversely across the front of the same, a tilting member tiltable about the. edge of said Vmember as it moves to tilted position, and means for maintaining said tilting member in 0perative relation to said transverse member.

8. In combination, a truck frame, a transverse member thereon having a depending portion, a tilting machine supporting member tiltable thereon during its tilting operation, and a keeper carried by said tilting member and lhaving a` lip coperating with said depending portion.

9. vIn a truck, a'truck frame, means disposed transversely relative to its front end and forming a knife edge, a tilting member tiltable about said knife edge, and means c0- operating with the said knife edge for supporting said tilting member in its horizontal position.

l0. In a truck, a truck fram-e having front and rear supporting wheels, a tilting mining machine loading and unloading member pivoted at a point substantially midway between its endson said frame and adjacent lthe front wheels of the latter on a transverse pivot disposed above the bottom of said frame,said member extending in `rear of the rear wheels; and means cooperating with said pivot to support. the .bottom of the portion of said tilting member in rear Vof its pivot above and in spaced relation to the upper surface of said truck frame.

' 11. In a truck, a truck frame having rigid and continuous flanged side members and front and rear supporting wheels, a longitudinally tilting flanged mining machine loading and unloading member pivoted at a point substantially midway between its ends on said frame and adjacent the front wheels of the latter on a transverse pivot disposed Vabove the bottom of said frame, said member extending in rear of the rear wheels and being receivable between the flanged side members of the truck frame, and means coperating with said pivot to support the bottomof the portion of said tilting member in rear of its pivot above and in spaced relation tothe upper surface 

